Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7dc41d97a00781b83ea9c77fa52648bd86b4ed56ee7a15cf0883fe5203c55e1' 
  AND token = 'stvs6nKt8RwQQDmRUgRcAAbNzx7IRUv4deDrC2rx3cc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}